There is much debate as to who won and lost the War of 1812. While most believe that the British won and the United States lost the war, there is even debate among those who answered this question. Below are the full arguments on both sides.
The British won due to the fact that they completed their objectives; defend Canada by killing the Americans who tried to invade.
American Deaths:11,300 killed, wounded or missing in action.
While most? Most who? Most British?
If defending Canada was the oblective... what were they doing in the Chesapeake, New York, Michigan Territories, and of all places New Orleans, Louisiana! Check a map Juan.
And when was the first or is this a typo? The Americans pretty much left "New France" and upper Canada alone during their revolution. There were incursions later, like the Feenians, but those weren't U.S. gov't supported and in some cases were actively opposed by US forces.
And heck... Confederates invaded Vermont from Canada... I guess the US beat Canada in the US Civil War. How absurd.